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[emacs.git] / src / mem-limits.h
blob30d57d8b51cb2e49f63cbb7105fcf31627433c2c
1 /* Includes for memory limit warnings.
2 Copyright (C) 1990, 1993, 1994, 1995, 1996, 2001, 2002, 2003, 2004,
3 2005, 2006, 2007 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA. */
22 #ifdef MSDOS
23 #include <dpmi.h>
24 extern int etext;
25 #endif
27 /* Some systems need this before <sys/resource.h>. */
28 #include <sys/types.h>
30 #ifdef _LIBC
32 #include <sys/resource.h>
33 #define BSD4_2 /* Tell code below to use getrlimit. */
35 /* Old Linux startup code won't define __data_start. */
36 extern int etext, __data_start; weak_extern (__data_start)
37 #define start_of_data() (&__data_start ?: &etext)
39 #else /* not _LIBC */
41 #ifdef HAVE_SYS_RESOURCE_H
42 # include <sys/time.h>
43 # include <sys/resource.h>
44 #else
45 # if HAVE_SYS_VLIMIT_H
46 # include <sys/vlimit.h> /* Obsolete, says glibc */
47 # endif
48 #endif
50 #ifdef __bsdi__
51 #define BSD4_2
52 #endif
54 #ifdef CYGWIN
55 #define BSD4_2
56 #endif
58 #ifndef BSD4_2
59 #ifndef USG
60 #ifndef MSDOS
61 #ifndef WINDOWSNT
62 #include <sys/vlimit.h>
63 #endif /* not WINDOWSNT */
64 #endif /* not MSDOS */
65 #endif /* not USG */
66 #else /* if BSD4_2 */
67 #include <sys/time.h>
68 #include <sys/resource.h>
69 #endif /* BSD4_2 */
71 #ifdef emacs
72 /* The important properties of this type are that 1) it's a pointer, and
73 2) arithmetic on it should work as if the size of the object pointed
74 to has a size of 1. */
75 typedef POINTER_TYPE *POINTER;
77 typedef unsigned long SIZE;
79 #ifdef NULL
80 #undef NULL
81 #endif
82 #define NULL ((POINTER) 0)
84 extern POINTER start_of_data ();
85 #if defined USE_LSB_TAG
86 #define EXCEEDS_LISP_PTR(ptr) 0
87 #elif defined DATA_SEG_BITS
88 #define EXCEEDS_LISP_PTR(ptr) \
89 (((EMACS_UINT) (ptr) & ~DATA_SEG_BITS) >> VALBITS)
90 #else
91 #define EXCEEDS_LISP_PTR(ptr) ((EMACS_UINT) (ptr) >> VALBITS)
92 #endif
94 #ifdef DATA_START
95 #define start_of_data() ((char *)DATA_START)
96 #endif
98 #ifdef BSD_SYSTEM
99 #ifndef DATA_SEG_BITS
100 #ifndef DATA_START
101 extern char etext;
102 #define start_of_data() &etext
103 #endif
104 #endif
105 #endif
107 #else /* not emacs */
108 extern char etext;
109 #define start_of_data() &etext
110 #endif /* not emacs */
112 #endif /* not _LIBC */
115 /* arch-tag: fe39244e-e54f-4208-b7aa-02556f7841c5
116 (do not change this comment) */